2. Questions Bank
  3. 12th Class
  4. Chemistry
  5. Solutions / विलयन

12th Class Chemistry Solutions / विलयन Question Bank Case Based (MCQs) - Solutions

  • question_answer
    The molar mass of the solute sodium hydroxide obtained from the measurement of osmotic pressure of its aqueous solution at \[27\text{ }{}^\circ C\] is 25 g \[mo{{l}^{-1}}\]. Therefore, the percentage ionisation of solution is :

    A) 75                                

    B) 60

    C) 80                                

    D) 70

    Correct Answer: B

    Solution :

    \[i=\frac{Normal\text{ }molar\text{ }mass}{Abnormal\text{ }molar\text{ }mass}\]=\[\frac{\left( 40\,g\,mo{{l}^{-1}} \right)}{\left( 25\,g\,mo{{l}^{-1}} \right)}\]=1.6 \[\alpha =\frac{i-1}{n-1}=\frac{1.6-1}{2-1}=0.6\] % ionisation =60.


You need to login to perform this action.
You will be redirected in 3 sec spinner